The side-splotched lizard (*Uta stansburiana*), commonly found in California, United States, displays striking variations in ...

The white-handed gibbon comes closest to humans in the study, with a monogamy rate of 63.5%. It’s the only other top-ranked “monotocous” species, meaning it usually has one offspring per pregnancy, ...

Lionesses are known to mate up to 40 times per day during their reproductive stage. Discover why lions mate so often here!

Boulenger’s backpack frog uses one of the strangest reproductive strategies in the amphibian world. Females carry fertilized ...